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Медведев вышел в финал турнира в Дубае17:59
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SpaceX has not responded to emailed requests from BBC News for comment. The researchers also sent their findings to the company but did not receive a response.
Discovered in Northamptonshire, Machin says it could have belonged to an active or former Roman gladiator, or even be a spectator's souvenir, even though there is no evidence of an arena or circus space in that part of the country.
Coast route crowned Britain's favourite path